Sams Teach Yourself ASP.NET Ajax in 24 Hours

I appreciate this book for what it is, which is to provide a high-level introduction to ASP.NET AJAX in an accessible format. This book was great for the basics, but it is sorely lacking in topics that you will need to apply AJAX to the real world, such as advanced scripting and different scenarios for using update panel triggers. I give this book 4 stars because it is good for what it is, and I recommend it if you are absolutely new to AJAX. I highly recommend another title "ASP.NET AJAX in Action" for an excellent treatment of advanced AJAX topics. In other words, the real world.